Combined gage and cutting-tool.



R. W. BASS.

APPLICATION FILED JULY 29, 1911.

after nu;

lA PLANOGRAPH COMBINED GAGE AND CUTTING TOOL,

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Mm G w M w L b ZH H UNITED STATES PATENT onnron.

ROBERT W. BASS, 016 ST. MATTHEWS, soUTl-I CAROLINA.

COMBINED GAGE AND CUTTING-TOOL.

To all whom it may concern Be it known that I ROBERT W. Bass, a citizenof the United tates, residing at St. Matthews, in the county of Calhounand State of South Carolina, have invented new and useful Improvementsin Combined Gages and Cutting-Tools, of which the following is aspecification.

This invention relates to cutting tools and more especially to acombined gage and cutting tool.

The primary object of the invention is to provide a tool of simple andimproved construction for cutting circular openings in sheet metal orother material.

A further object of the invention is the pro-vision of a simple andefficient tool of this character wherein the cutting member and thecentering member may be relatively adjusted for the purpose of enablingopenings of various diameters to be formed.

A further object of the invention is to provide a tool wherein thecutting member is relatively stationary, the centering member beingassociated with a slide which may be quickly and conveniently adjusted.

With these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

In the accompanying drawing has been illustrated a simple and preferredform of the invention, it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited,but that changes, alterations and modifications within the scope of theclaims may be resorted to when desired.

In the drawing,-Figure 1 is a side elevation of a tool constructed inaccordance with the invention, the same being shown in position forcutting a piece of sheet metal. Fig. 2 is a top plan view thereof. Fig.3 is a fragmentary vertical longitudinal sectional view through thesame, the centering tool having been detached. Fig. 1 is a transversesectional view taken on the line 4- 1 in Fig. 1.

Corresponding parts in the several figures are denoted by likecharacters of reference.

The tool comprises an elongated gage body consisting of a flat bar 5,the same being formed integral with a handle 6 which is Specification ofLetters Patent.

Application filed July 29, 1911.

Patented June 16, 191 1.

Serial No. 641,198.

offset in a plane above the plane of the body 5 through the medium of anintermediate obliquely disposed portion 7 The body 5 is provided with anelongated slot 8, the same being disposed longitudinally thereof for thepassage of a bolt 9, the latter being also passed through aliningapertures in a gage block or slide 10 and cap plate 11, said block orslide being disposed against the bottom face of the bar or body, whilethe cap plate which is composed of heavy sheet metal is disposed againstthe top face of the bar, the bolt 9 carrying a wing nut 12 which may betightened against the cap plate for the purpose of locking the latterand the slide 10 in adjusted position. The cap plate 11 is provided withdownturned side flanges 13 engaging the side faces of the bar, the uppercorners of which are preferably beveled, as shown. The underside of theslide 10 has a recess 14 to accommodate the bolt head 15 in order thatthe latter will not interfere with the placing of the slide squarelyupon the sheet or object to be out. At the inner end of the body 5, andformed by the handle 6 is an abutment shoulder 14: against which theslide 10 may contact to limit the movement thereof in one direction.

The slide 10 and the cap plate 11 are provided with vertical aliningopenings 15 for the passage of a centering tool 16, the lower end ofwhich is adapted to be inserted into and to engage a sheet of tin,galvanized iron or other sheet metal, whereby the tool may be held inproper position for cutting a circular hole in the metal.

Formed in the handle 6 contiguous to the shoulder 14: is a verticallydisposed square opening 19 in which a cutting bit 20 is preferablysecured, as by means of a cross bolt 21. The bit 20 is beveled at oneend to provide a cutting edge 22 which is adapted to cut into the sheetmetal when the handle is turned in a circle about the axis of thecentering tool, thereby cutting the metal so as to provide a circularhole therein of the required size.

It will be seen that the slide 10 and the cap plate 11 which areconnected together by the bolt 9 and which are adjustably clamped bysaid bolt on the body of the gage bar serves to retain, by means of thealining openings 15 in said slide and cap plate, the centering tool 16,which latter may consist of an ordinary center punch or any convenientsharp-pointed rod of proper dimensions. Said centering tool will thus beadjustable with respect to the cutting bit, which latter is stationarywith respect to the bar or body of the tool, but said centering tool maybe readily detached for sharpening or other purposes being placedloosely in engagement with the slide and the cap plate.

The tool is extremely simple in'its construction, and it has been foundthoroughly eflicient for the purposes for which it is provided.

Having thus described the invention, what is claimed as new, is

A device of the class described comprising a vertically slotted barhaving an upwardly offset handle, a cutting tool secured adjacent oneend of the slot, a centering tool, and a slidable support for the lattercomprising a slide block, and a cap plate engaging the under and uppersides of the bar, and a clamp bolt extending through said block and capplate and having a nut; said block and cap plate being provided withalining openings for the reception of a centering tool.

In testimony whereof I allix my signature in presence of two witnesses.

ROBERT \V. BASS.

lVitnesses: V E. C. MANN, J. C. REDMON.

Copies of this patent may be obtained for five cents each,

Washington,

by addressing the Commissioner of Patents. 1). C.

